A series of laboratory Investigations were performed on specimens of different proportions of Bentonite clay and silt to evaluate how the different proportions of Bentonite clay and silt vary the strength of the soil mix, with and without reinforcement, thereby to measure the corresponding changes in the strength and stress–strain properties. In this investigation Bentonite clay was treated as expansive soil and silt was treated as a primary stabilization agent. Series of investigations were performed to determine the effect of primary stabilizer silt, Polypropylene and Nylon Fiber on the Liquid Limit, Plastic Limit, Plasticity Index, Optimum moisture content, Maximum Dry Density, and Unconfined Compressive Strength of the Bentonite. The effect of different mixtures of the specimen was found to be important for the mix compacted at Optimum moisture content. While no clear threshold has been identified for different proportions of the mixture, the data indicate that increment to the percentage up to 20 percent of silt in clay produces the reasonable strength (UCS) to the mixture. Laboratory investigation results show that the effect of reinforcement with synthetic type fibers (like Polypropylene and Nylon Fiber) in the soil mixture having silt produce further complementary changes in strength and consistency limits.